body {
    background-color: red;
    animation: dayDoing .5s infinite;
    perspective: 600px;
}

@keyframes dayDoing {
    0% {
        transform: rotateX(00deg);
    }
    50% {
        transform: rotateX(90deg);
    }
    100% {
        transform: rotateX(1800deg);
        background-color: #735653
    }
}